/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.dolphinscheduler.plugin.task.api;

import org.apache.dolphinscheduler.plugin.task.api.model.ApplicationInfo;

import org.apache.commons.lang3.StringUtils;

import java.util.List;

public abstract class AbstractRemoteTask extends AbstractTask {

  /**
   * constructor
   *
   * @param taskExecutionContext taskExecutionContext
   */
  protected AbstractRemoteTask(TaskExecutionContext taskExecutionContext) {
    super(taskExecutionContext);
  }

  @Override
  public void cancel() throws TaskException {
    this.cancelApplication();
  }

  public abstract List<String> getApplicationIds() throws TaskException;

  public abstract void cancelApplication() throws TaskException;

  /**
   * If appIds is empty, submit a new remote application; otherwise, just track application status.
   *
   * @param taskCallBack
   * @throws TaskException
   */
  @Override
  public void handle(TaskCallBack taskCallBack) throws TaskException {
    // if appIds is not empty, just track application status, avoid resubmitting remote task
    if (StringUtils.isNotEmpty(taskRequest.getAppIds())) {
      setAppIds(taskRequest.getAppIds());
      trackApplicationStatus();
      return;
    }

    // submit a remote application
    submitApplication();

    if (StringUtils.isNotEmpty(getAppIds())) {
      taskRequest.setAppIds(getAppIds());
      // callback to update remote application info
      taskCallBack.updateRemoteApplicationInfo(taskRequest.getTaskInstanceId(), new ApplicationInfo(getAppIds()));
    }

    // keep tracking application status
    trackApplicationStatus();
  }

  /**
   * submit a new remote application and get application info
   *
   * @return
   * @throws TaskException
   */
  public abstract void submitApplication() throws TaskException;

  /**
   * keep checking application status
   *
   * @throws TaskException
   */
  public abstract void trackApplicationStatus() throws TaskException;
}
